Composition for lithic building material.



COATING Pl AST'C unuoo ncrcnmuc 14b zyz STATES P TENToFFmE.

L. WILLING m OAUGfiY MG, OI BELLEVUE, OHIO.

In Drawing.

To all whom it may concern: 1

Be it known that we, WngaAu'L. Wrin- IN'G and CAUGHY B. Wilma, citizensof the United States, residing at Bellevue, in the county of Huron, andState of Ohio, have invented a certain new and useful Imgrovement in Comositions for Lithic uilding Material, 0 which the following is a full,clear, and exact description.

The object of this invention is to provide a building material whichshall have the durable, fire-proof and other characteristics of usualconcrete, and shall also be readily workable with a saw, boring tools,etc., very much after the manner of lumber, Such material, molded intoslabs similar to lumber, is very useful, as it may be formed intodesired shapes by a carpenter, may be readily secured in position in astructure, and may be used in various places where it is impracticableto pour concrete.

We have discovered that a desirable material for this purpose may bemade by a mixture of Portland nt and what is known as anu a s a at is,the r;v sicular,pum1cee su ance resulting from s ra in water onto mo ensa is n- 95 5 slag, so called, Has very di erent characteristics fromground or pulverized 80 slag, and consists of small, very light, ir-

regular, porous particles, resembling pieces of fine sponge but of afriable nature.

In making our concrete lumber we mix 85 Portland cement, with or withoutother malpeeiicaflon of Letters latent. Application fled June so, me- 8er1al Io. 108,83 9.

' pourin OOIIOSmON FOB LI'LBIG Patented May 15, 1917.

we o,

the latter case several days being preferably employed.

We have found thatbyemploying .some

quantity of crushed sla? sand with the mixture of Portland cemen anporous granulated slag, we are able to pour the mixture when it has asufiicient quantity of water.

In that case it may be made into slabs by and drying, or may be pouredin place i desired. When it is desired to use the pouring method, weprefer proportions of substantially one part Portland cement, two partscrushed slag sand, and four parts porous granulated slag. Whichevermethod is used," a-suflicient quantity of the porous granulated slag isemployed to give the composition the artificial lumber characteristicsstated.

' We have found that the composition described may .be readily 'madeinto slabs, planks or building members, which can be sawed and haveholes drilled into them, and used after the general manner of lumber.Our slabs have a weight commensurate with that of oak; they arefire-proof, durable and strong, and they present a surface adaptedtoreceive plaster. Havingxthese and other desirable characteristics, tey are adapted for a great variety of uses in building construction.These planks, which we have named concrete lumber, may be kept in stockin convenient sizes, ready for use wherever desired.

we claim is:

the pumiciform material described witt\ Having thus described ourinvention,what

terials, and in varied considera qi ir t result y, c rdinguto there- Iatis WWhere onl 1s emp oyed with the porous granu- 45 lated slag, we,prefer proportions intermediate of these two.

The porous granulated slag and cement may be mixed together with asufiicient (iumti of water to enable the compositionto rea 50 ily moldedinto the desired shape, and, in

such case, we refer to use a considerably less quantity 0 water thanwould enable the material tor-be poured. After molding 1t 1s dried,either'by artificial or natural heat, in

lk Mid. q

roportion which mg,y b

1. A substance for use as a building material consisting of porousgranulated slag crushed slag sand, and cement, in about thd propofiionsspecifie 2. A composition of matter comprismg a mixture of porousgranulated slag and cement in about the proportions specified.

3. A building material in the form of concrete lumber comprising planks0r slabs ,made by together ortland cement and porous granulated slaginabout the proportlons specified as preferred, the composition beingmoistened, molded to shape and then dried.

our signatures.

. L. WELING.

CAUGHY B'. WILLING.

In testimony whereof we hereunto afiix

